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namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex32
{
    using LinearAlgebra.Complex32;
    using LinearAlgebra.Generic;
    using Complex32 = Numerics.Complex32;

    /// <summary>
    /// User-defined vector implementation (internal class for testing purposes)
    /// </summary>
    internal class UserDefinedVector : Vector
    {
        /// <summary>
        /// Values storage
        /// </summary>
        private readonly Complex32[] _data;

        /// <summary>
        /// Initializes a new instance of the <see cref="UserDefinedVector"/> class with a given size.
        /// </summary>
        /// <param name="size">The size of the vector.</param>
        public UserDefinedVector(int size) : base(size)
        {
            _data = new Complex32[size];
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="UserDefinedVector"/> class for an array.
        /// </summary>
        /// <param name="data">The array to create this vector from.</param>
        public UserDefinedVector(Complex32[] data) : base(data.Length)
        {
            _data = (Complex32[])data.Clone();
        }

        /// <summary>Gets or sets the value at the given <paramref name="index"/>.</summary>
        /// <param name="index">The index of the value to get or set.</param>
        /// <returns>The value of the vector at the given <paramref name="index"/>.</returns> 
        public override Complex32 this[int index]
        {
            get
            {
                return _data[index];
            }

            set
            {
                _data[index] = value;
            }
        }

        /// <summary>Gets the value at the given <paramref name="index"/>.</summary>
        /// <param name="index">The index of the value to get or set.</param>
        /// <returns>The value of the vector at the given <paramref name="index"/>.</returns> 
        protected internal override Complex32 At(int index)
        {
            return this[index];
        }

        /// <summary>Sets the <paramref name="value"/> at the given <paramref name="index"/>.</summary>
        /// <param name="index">The index of the value to get or set.</param>
        /// <param name="value">The value to set.</param>
        protected internal override void At(int index, Complex32 value)
        {
            this[index] = value;
        }

        /// <summary>
        /// Creates a matrix with the given dimensions using the same storage type as this vector.
        /// </summary>
        /// <param name="rows">The number of rows.</param>
        /// <param name="columns">The number of columns.</param>
        /// <returns>A matrix with the given dimensions.</returns>
        public override Matrix<Complex32> CreateMatrix(int rows, int columns)
        {
            return new UserDefinedMatrix(rows, columns);
        }

        /// <summary>
        /// Creates a <strong>Vector</strong> of the given size using the same storage type as this vector.
        /// </summary>
        /// <param name="size">The size of the <strong>Vector</strong> to create.</param>
        /// <returns>The new <c>Vector</c>.</returns>
        public override Vector<Complex32> CreateVector(int size)
        {
            return new UserDefinedVector(size);
        }
    }
}